{"api_version":"1","generated_at":"2026-06-25T10:16:09+00:00","cve":"CVE-2026-53013","urls":{"html":"https://cve.report/CVE-2026-53013","api":"https://cve.report/api/cve/CVE-2026-53013.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53013","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53013"},"summary":{"title":"macvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF\n\nmacvlan_get_size() does not account for IFLA_MACVLAN_BC_CUTOFF, but\nmacvlan_fill_info() conditionally includes it when port->bc_cutoff != 1.\nThis causes nla_put_s32() to fail with -EMSGSIZE when the netlink skb\nruns out of space, triggering a WARN_ON in rtnetlink and preventing the\ninterface from being dumped.\n\nThe bug can be reproduced with:\n\n  ip link add macvlan0 link eth0 type macvlan mode bridge\n  ip link set macvlan0 type macvlan bc_cutoff 0\n  ip -d link show macvlan0   # fails with -EMSGSIZE\n\nThe bc_cutoff feature was added in commit 954d1fa1ac93 (\"macvlan: Add\nnetlink attribute for broadcast cutoff\"), which added the nla_put_s32()\ncall in macvlan_fill_info() but missed adding the corresponding\nnla_total_size(4) in macvlan_get_size(). A follow-up commit\n55cef78c244d (\"macvlan: add forgotten nla_policy for\nIFLA_MACVLAN_BC_CUTOFF\") fixed the missing nla_policy entry but still\ndid not fix the size calculation.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 17:17:12","updated_at":"2026-06-24 17:17:12"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/4979252758387b338ca968ba7e0515b0ae2257e3","name":"https://git.kernel.org/stable/c/4979252758387b338ca968ba7e0515b0ae2257e3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fa92a77b0ed4d5f11a71665a232ac5a54a4b055d","name":"https://git.kernel.org/stable/c/fa92a77b0ed4d5f11a71665a232ac5a54a4b055d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b6b7154e9f5d75b608ceb2d05b376de8c638c40e","name":"https://git.kernel.org/stable/c/b6b7154e9f5d75b608ceb2d05b376de8c638c40e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/77ecfa4e27f282d224215895ddfbeb916fc75e24","name":"https://git.kernel.org/stable/c/77ecfa4e27f282d224215895ddfbeb916fc75e24","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1c004f14ccdc11585625c168bb9a7c5e1b8afb0c","name":"https://git.kernel.org/stable/c/1c004f14ccdc11585625c168bb9a7c5e1b8afb0c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53013","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53013","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 4979252758387b338ca968ba7e0515b0ae2257e3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 77ecfa4e27f282d224215895ddfbeb916fc75e24 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 b6b7154e9f5d75b608ceb2d05b376de8c638c40e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 1c004f14ccdc11585625c168bb9a7c5e1b8afb0c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 fa92a77b0ed4d5f11a71665a232ac5a54a4b055d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.141 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.91 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.33 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.10 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/macvlan.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4979252758387b338ca968ba7e0515b0ae2257e3","status":"affected","version":"954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348","versionType":"git"},{"lessThan":"77ecfa4e27f282d224215895ddfbeb916fc75e24","status":"affected","version":"954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348","versionType":"git"},{"lessThan":"b6b7154e9f5d75b608ceb2d05b376de8c638c40e","status":"affected","version":"954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348","versionType":"git"},{"lessThan":"1c004f14ccdc11585625c168bb9a7c5e1b8afb0c","status":"affected","version":"954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348","versionType":"git"},{"lessThan":"fa92a77b0ed4d5f11a71665a232ac5a54a4b055d","status":"affected","version":"954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/macvlan.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.141","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.91","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.33","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.141","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.91","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.33","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.10","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF\n\nmacvlan_get_size() does not account for IFLA_MACVLAN_BC_CUTOFF, but\nmacvlan_fill_info() conditionally includes it when port->bc_cutoff != 1.\nThis causes nla_put_s32() to fail with -EMSGSIZE when the netlink skb\nruns out of space, triggering a WARN_ON in rtnetlink and preventing the\ninterface from being dumped.\n\nThe bug can be reproduced with:\n\n  ip link add macvlan0 link eth0 type macvlan mode bridge\n  ip link set macvlan0 type macvlan bc_cutoff 0\n  ip -d link show macvlan0   # fails with -EMSGSIZE\n\nThe bc_cutoff feature was added in commit 954d1fa1ac93 (\"macvlan: Add\nnetlink attribute for broadcast cutoff\"), which added the nla_put_s32()\ncall in macvlan_fill_info() but missed adding the corresponding\nnla_total_size(4) in macvlan_get_size(). A follow-up commit\n55cef78c244d (\"macvlan: add forgotten nla_policy for\nIFLA_MACVLAN_BC_CUTOFF\") fixed the missing nla_policy entry but still\ndid not fix the size calculation."}],"providerMetadata":{"dateUpdated":"2026-06-24T16:29:23.856Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4979252758387b338ca968ba7e0515b0ae2257e3"},{"url":"https://git.kernel.org/stable/c/77ecfa4e27f282d224215895ddfbeb916fc75e24"},{"url":"https://git.kernel.org/stable/c/b6b7154e9f5d75b608ceb2d05b376de8c638c40e"},{"url":"https://git.kernel.org/stable/c/1c004f14ccdc11585625c168bb9a7c5e1b8afb0c"},{"url":"https://git.kernel.org/stable/c/fa92a77b0ed4d5f11a71665a232ac5a54a4b055d"}],"title":"macvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53013","datePublished":"2026-06-24T16:29:23.856Z","dateReserved":"2026-06-09T07:44:35.378Z","dateUpdated":"2026-06-24T16:29:23.856Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 17:17:12","lastModifiedDate":"2026-06-24 17:17:12","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53013","Ordinal":"1","Title":"macvlan: fix macvlan_get_size() not reserving space for IFLA_MAC","CVE":"CVE-2026-53013","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53013","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmacvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF\n\nmacvlan_get_size() does not account for IFLA_MACVLAN_BC_CUTOFF, but\nmacvlan_fill_info() conditionally includes it when port->bc_cutoff != 1.\nThis causes nla_put_s32() to fail with -EMSGSIZE when the netlink skb\nruns out of space, triggering a WARN_ON in rtnetlink and preventing the\ninterface from being dumped.\n\nThe bug can be reproduced with:\n\n  ip link add macvlan0 link eth0 type macvlan mode bridge\n  ip link set macvlan0 type macvlan bc_cutoff 0\n  ip -d link show macvlan0   # fails with -EMSGSIZE\n\nThe bc_cutoff feature was added in commit 954d1fa1ac93 (\"macvlan: Add\nnetlink attribute for broadcast cutoff\"), which added the nla_put_s32()\ncall in macvlan_fill_info() but missed adding the corresponding\nnla_total_size(4) in macvlan_get_size(). A follow-up commit\n55cef78c244d (\"macvlan: add forgotten nla_policy for\nIFLA_MACVLAN_BC_CUTOFF\") fixed the missing nla_policy entry but still\ndid not fix the size calculation.","Type":"Description","Title":"macvlan: fix macvlan_get_size() not reserving space for IFLA_MAC"}]}}}